As of 13 August 2026, AI can create a brand voice guide for your business.

What to actually do

1. Do it yourself

   The route this page recommends

   A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open a document and gather your current website pages, brochures, emails, social posts and customer support replies, marking two or three examples that sound right and two that sound wrong.
   2. Write down your actual audience, offer, differentiators, values, desired customer impression and phrases or claims you do not want to use.
   3. Paste that material into the prompt, including any sector, accessibility, legal or house-style requirements that affect your copy.
   4. Run the prompt in a chatbot and save the first complete guide, including its missing-information list.
   5. Compare every stated fact and example in the guide with your source material, deleting any invented claim or unsupported description.
   6. Ask the chatbot to rewrite one real website section, one email and one social post using the guide, then compare each version with your preferred examples.
   7. Ask a colleague who knows the business and its customers to mark where the guide feels inaccurate or unlike the business, and incorporate only changes you can explain.
   8. Put the approved guide beside your content calendar or website workflow and use its checklist on the next pieces of copy before publishing.

   Prompt

   Create a practical brand voice guide for my UK business using only the information and examples below. Do not invent facts, customer research, values, awards, claims or brand history. Separate facts I supplied from recommendations you make.
   
   Business: [business name and what it sells]
   Audience: [who we serve, including relevant UK audience details]
   Positioning: [why customers choose us and what makes us different]
   Brand values: [values we genuinely want to express]
   Desired customer impression: [how customers should feel after reading our copy]
   Undesired impressions: [tones, phrases or clichés to avoid]
   Existing copy that sounds right: [paste 3 to 5 representative examples]
   Existing copy that sounds wrong: [paste examples if available]
   Practical constraints: [legal, sector, accessibility, house-style or channel requirements]
   
   Produce the guide with these sections:
   1. One-paragraph voice summary
   2. Five specific voice principles, each with a short explanation
   3. Tone adjustments for website pages, product or service descriptions, email, social posts and customer support
   4. Words, phrases and punctuation to prefer
   5. Words, phrases and claims to avoid
   6. Sentence-length, formatting and readability guidance
   7. Three before-and-after rewrites using only facts from my material
   8. A short checklist another writer can use before publishing
   
   Make the guidance specific enough for another writer to apply. Flag any missing information that prevents a confident recommendation. Do not describe the voice with empty labels such as 'professional' or 'friendly' unless you define exactly what they mean in observable writing choices. Use British English and UK spelling.

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.

2. Use a tool built for this

   Second choice

3. Hand it to a person

   The distant third

   A person who owns the outcome does this end to end, worth it when the failure is dear.